Concept:Hail, fog, dew and frost are all grouped as forms of precipitation in the broader geographical sense.
Explanation:Precipitation means any moisture that reaches the ground from the atmosphere.
Hail is frozen rain that falls from storm clouds.
Fog is a visible mass of tiny water droplets suspended near the Earth's surface.
Dew is formed when water vapour condenses on cool surfaces like grass and leaves.
Frost is the frozen form of dew or deposited water vapour that appears in cold conditions.
All these processes bring atmospheric moisture to the ground.
Therefore, they all belong to the category of precipitation.
Answer:D. precipitation